Self-threading shuttle.



APPLICATION F ,1914. LM5M l Patented July 6, 1915.

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ROBERT N. ALLEN, 0F IVIETI-IUEN,MASSACHUSETTS, ASSIGNOR TO U. S. BOBBIN & SHUTTLE COMPANY, OF PROVIDENCE, RHODE ISLAND, `A CORPORATION OF NEW JERSEY.

sELnTHnEADING SHUTTLE.

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Application filed November 6, 1914. Serial No. 870,588.

T0 all whom 'it may concern:

Be it known that I, ROBERT N. ALLEN, a citizen of the United States, residing at Methuen, in the county of Essex and State of Massachusetts, have invented a new and useful Improvement in Self-Thread1ng purpose indicated which is of simple and economical construction and` which can be easily and quickly 4 incorporated in the shuttle.

Further, the invention aims to provide a threading device which will effectively prevent accidental unthreading during the shuttle movements.

In the drawings Figure 1 is a fragmentary top plan view of a shuttle having the present invention applied thereto;` Fig. 2 is a section taken on the line 2 2 of Fig. 1. Fig. 3 is a section taken on the line 3-3 of Fig. 2, and Fig. l is a detail bottom plan view of the threading device.

In proceeding in accordance with the present invention, the shuttle S is provided with an inclined longitudinal bore or passage P which leads from the bobbin cavity or chamber through the front end of the shuttle so as to enable the threading device now to be described to be easily and quickly driven into the bore.

The threading device is of substantially cylindrical form and is of hollow formation so as to provide a thread passage completely therethrough. A slot 1 is cut in one end of the cylinder while a second similar slot 2 is cut in the opposite end of the cylinder, the slots 1 and 2 having a downwardly divergent relationship as shown in Fig. 2, and extending through the respective rear and front ends of the cylinder and into a cutaway central portion 3 which is common to the inner ends of each of the slots. The front end of the threading device is cutaway at t and formed with a guard linger 5 which extends into a thread receiving opening 6, which latter is located in the bottom of the cylinder, while the slots 1 and 2 are located in one of the sides of the cylinder. lllhe cylinder is further provided with a transverse opening 5 through which the securing bolt 6 passes to hold the cylinder in position with relation to the shuttle.,

rlhe thread receiving opening 6 registers with the delivery eye passage D of the shuttle, the eye .being provided with wear pins 8 on its opposite sides as depicted in Fig. 3, of the drawings. `'l `he,cutaway part 4 provides acurved thread riding edge 9 on which the thread rides in entering the opening 6 and is prevented from being accidentally disengaged from the opening 6 by means of the guard finger 5. y

In operation it will be understood, that there being slight space between the` side of the cylinder opposite to the side which lies adjacent to the delivery eye andthe adi jacent side of the passage P, as indicated at `10, the thread is placed longitudinally of the cylinder and` drawn down through the space at 10, until the wall 11, `which the cutaway part?) provides, is met with, whereupon the thread `is drawnrinwardly toward the interior of the cylinder which causes the thread to pass through the slots 1 and 2 and enter the cylinder interior. The thread is then drawn to ride down the edge 9 and to pass the guard linger 5 which causes the thread to enter the opening 6, and passing in the space 12 beneath the cylinder bottom enter the delivery eye. It will thus be apparent that accidental unthreading of the shuttle is prevented, since to unthread same the thread must enter each of the slots 1 and 2, and due to the upwardly convergent relationship of the slots, the chance of the thread entering same or passing through same is reduced to a minimum, especially since the wall 11 has an inclined disposition due to the inclination of the cylinder.

Having thus described my invention, I claim as new and desire to secure by Letters Patent;

1. In a shuttle having an upwardly inclined longitudinal bore which leads from the bobbin cavity through the front end of the shuttle, a hollow cylindrical element having a centra-l cutaway part in its top and a pair of upwardly convergent slots in its inner side which slots extend from the cutaway portion through the respective cylinder ends, said cylinder having a thread opening in its bottom and having its front end formed with a cutaway part which provides an inclined edge leading down and to ward the opening, a guard finger extending Ufinger and then enter said thread opening Copies of this patent may be obtained for and pass below the cylinder bottom and enter the shuttle delivery eye.

2. In a shuttle having an upwardly inclined longitudinal passage leading from the bobbin cavity through the front end of the shuttle, a hollow cylinder in said passage having 'a centralcutaway part and a pair of Slots leading from the cutaway part through the cylinder ends, said slots being divergently related and'located on the inner side voi the cylinder, the front end portion of the lcylinder havingan opening in'its bottom and a guard for the opening which latter is spaced from the adjacent portion of the cylinder to allow the thread to pass below the guard linger and to enter the opening.

4 3. In a shuttle having a bore, and a hollow cylinder in the bore having end slots which are located on one side of the cylinder and which are divergently related, and a central cutaway part interposed between and spacing the slots, the cutaway part providing 'a wall joining the slots and serving to direct the thread thereinto, said cylinder having an opening in its bottom to receive the thread. l

t. In a shuttle, a hollow cylinder the ends of which communicate with the delivery eye and the bobbin cavity, said cylinder having a central cutaway part and inclined slots leading therefrom through the ends of the cylinder.

5. In a shuttle, a hollow cylinder the ends of which communicate with the delivery eye and the bobbin cavity, said cylinder having a side entrance for the'thread and having an opening in its bottom which is spaced upwardly from the bottom of the shuttle delivery eye to allow the thread to pass down through the opening into the delivery eye.

6. In a shuttle, a hollow cylinder the ends of which communicate with the delivery eye and the bobbin cavity, said cylinder having a side thread entrance and a bobbin delivery eye.

Intestimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ROBERT N. ALLEN.

Witnesses:

vrALBION G. Pinnen,

M. IRENE CARR.

ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

